Techniques for securing virtual cloud assets at rest against cyber threats

ABSTRACT

A method and system for securing virtual cloud assets at rest against cyber threats. The method comprises determining a location of a view of at least one virtual disk of a protected virtual cloud asset, wherein the virtual cloud asset is at rest and, when activated, instantiated in the cloud computing environment; accessing the view of the virtual disk based on the determined location; analyzing the view of the protected virtual cloud asset to detect potential cyber threats risking the protected virtual cloud asset, wherein the virtual cloud asset is inactive during the analysis; and alerting detected potential cyber threats based on a determined priority.

This application claims the benefit of U.S. Provisional Application No.62/797,718 filed on Jan. 28, 2019, the contents of which are herebyincorporated by reference.

TECHNICAL FIELD

This disclosure relates generally to cyber-security systems and, morespecifically, to techniques for securing virtual machines.

BACKGROUND

Organizations have increasingly adapted their applications to be runfrom multiple cloud computing platforms. Some leading public cloudservice providers include Amazon®, Microsoft®, Google®, and the like.

Virtualization plays a key role in a cloud computing, allowing multipleapplications and users to share the same cloud computing infrastructure.For example, a cloud storage service can maintain data of multipledifferent users.

In one instance, virtualization can be achieved by means of virtualmachines. A virtual machine emulates a number of “computers” orinstances, all within a single physical device. In more detail, virtualmachines provide the ability to emulate a separate operating system(OS), also referred to as a guest OS, and, therefore, a separatecomputer, from an existing OS (the host). This independent instance istypically isolated as a completely standalone environment.

Modern virtualization technologies are also adapted by cloud computingplatforms. Examples for such technologies include virtual machines,software containers, and serverless functions. With their computingadvantages, applications and virtual machines running on top ofvirtualization technologies are also vulnerable to some cyber threats.For example, virtual machines can execute vulnerable softwareapplications or infected operating systems.

Protection of a cloud computing infrastructure, and, particularly, ofvirtual machines, can be achieved via inspection of traffic.Traditionally, traffic inspection is performed by a network deviceconnected between a client and a server (deployed in a cloud computingplatform or a data center) hosting virtual machines. Traffic inspectionmay not provide an accurate indication of the security status of theserver due to inherent limitations, such as encryption and whether thenecessary data is exposed in the communication.

Furthermore, inspection of computing infrastructure may be performed bya network scanner deployed out of path. The scanner queries the serverto determine if the server executes an application that possess asecurity threat, such as vulnerability in the application. Thedisadvantage of such a scanner is that the server may not respond to allqueries by the scanner or that the server may not expose the necessarydata in the response. Further, the network scanner usually communicateswith the server, and the network configuration may prevent suchcommunication. In addition, some types of queries may requirecredentials to access the server. Such credentials may not be availableto the scanner.

Traffic inspection may also be performed by a traffic monitor thatlistens to traffic flows between clients and the server. The trafficmonitor can detect some cyber threats, e.g., based on the volume oftraffic. However, the monitor can detect threats only based on themonitored traffic. For example, misconfiguration of the server may notbe detected by the traffic monitor. As such, traffic monitoring wouldnot allow for detection of vulnerabilities in software executed by theserver.

To overcome the limitations of traffic inspection solutions, somecyber-security solutions, such as vulnerability management and securityassessment solutions, are based on agents installed in each server in acloud computing platform or data center. Using agents is a cumbersomesolution for a number of reasons, including IT resource management,governance, and performance. For example, installing agents in a largedata center may take months.

Further, traffic monitoring does not allow detection of vulnerabilitiesin data at rest. Data at rest, in information technology, means inactivedata that is stored physically in any digital form. Data at rest mayinclude data, services, and/or services that are inactive but can beaccessed or executed as needed. Similarly, in cloud computing, somemachines (e.g., virtual machines) may also be at rest. Some machines areconfigured with applications or services which are infrequentlyexecuted. For example, such a machine may be utilized during one monthof the year and remain inactive for the rest in the year. While at rest,the machines are powered off, and are not inspected for vulnerabilities,simply because scanners and/or installed monitoring agents cannotoperate on a powered-off machine.

Another attempt would be to scan a machine at rest when the machine ispowered on and preserving a log of its latest status. However, thiswould require keeping an updated log of the machine's configurations andall its applications. Further, as threats constantly evolve, scanningbased on past information may not be relevant. As such, when data or amachine at rest becomes active, undetected vulnerabilities can posecyber threats.

It would therefore be advantageous to provide a security solution thatwould overcome the deficiencies noted above.

SUMMARY

A summary of several example embodiments of the disclosure follows. Thissummary is provided for the convenience of the reader to provide a basicunderstanding of such embodiments and does not wholly define the breadthof the disclosure. This summary is not an extensive overview of allcontemplated embodiments, and is intended to neither identify key orcritical elements of all embodiments nor to delineate the scope of anyor all aspects. Its sole purpose is to present some concepts of one ormore embodiments in a simplified form as a prelude to the more detaileddescription that is presented later. For convenience, the term “someembodiments” or “certain embodiments” may be used herein to refer to asingle embodiment or multiple embodiments of the disclosure.

Certain embodiments disclosed herein include a method for securingvirtual cloud assets at rest against cyber threats. The method comprisesdetermining a location of a view of at least one virtual disk of aprotected virtual cloud asset, wherein the virtual cloud asset is atrest and, when activated, instantiated in the cloud computingenvironment; accessing the view of the virtual disk based on thedetermined location; analyzing the view of the protected virtual cloudasset to detect potential cyber threats risking the protected virtualcloud asset, wherein the virtual cloud asset is inactive during theanalysis; and alerting detected potential cyber threats based on adetermined priority.

Certain embodiments disclosed herein also include a system for securingvirtual cloud assets at rest against cyber threats, comprising: aprocessing circuitry; and a memory, the memory containing instructionsthat, when executed by the processing circuitry, configure the systemto: determine a location of a view of at least one virtual disk of aprotected virtual cloud asset, wherein the virtual cloud asset is atrest and, when activated, instantiated in a cloud computing environment;access the view of the virtual disk based on the determined location;analyze the view of the protected virtual cloud asset to detectpotential cyber threats risking the protected virtual cloud asset,wherein the virtual cloud asset is inactive during the analysis; andalert detected potential cyber threats based on a determined priority.

BRIEF DESCRIPTION OF THE DRAWINGS

The subject matter disclosed herein is particularly pointed out anddistinctly claimed in the claims at the conclusion of the specification.The foregoing and other objects, features, and advantages of thedisclosed embodiments will be apparent from the following detaileddescription taken in conjunction with the accompanying drawings.

FIGS. 1A and 1B are network diagrams utilized to describe the variousembodiments.

FIG. 2 is a flowchart illustrating a method detecting cyber threats,including potential vulnerabilities in virtual machines executed in acloud computing platform according to some embodiments.

FIG. 3 is an example block diagram of the security system according toan embodiment.

DETAILED DESCRIPTION

It is important to note that the embodiments disclosed herein are onlyexamples of the many advantageous uses of the innovative teachingsherein. In general, statements made in the specification of the presentapplication do not necessarily limit any of the various claimedembodiments. Moreover, some statements may apply to some inventivefeatures but not to others. In general, unless otherwise indicated,singular elements may be in plural and vice versa with no loss ofgenerality. In the drawings, like numerals refer to like parts throughseveral views.

Various techniques disclosed herein include techniques for securing dataat rest or machines at rest (collectively referred to as “machines atrest”). Data at rest may include inactive data that is stored physicallyin any digital form. Machines at rest may include a virtual machineconfigured service(s) and/or application(s) that are inactive but can beaccessed or executed as needed. The applications and/or services in suchmachines at rest are infrequently executed. The disclosed techniques areutilized to scan for embedded vulnerabilities in machines at rest, whenthe machine is powered off. For example, a machine at rest may beutilized during one month of the year and remain inactive for the restin the year. According to the disclosed embodiments, the machine isscanned for vulnerabilities when it is in its inactive step.

FIGS. 1A and 1B show an example network diagram 100 utilized to describethe various embodiments. A cloud computing platform 110 is communicablyconnected to a network 120. Examples of the cloud computing platform 110may include a public cloud, a private cloud, a hybrid cloud, and thelike. Examples of a public cloud include, but are not limited to, AWS®by Amazon®, Microsoft Azure®, Google Cloud®, and the like. In someconfigurations, the disclosed embodiments may be operable in on-premisesvirtual machine environments. The network 120 may be the Internet, theworld-wide-web (WWW), a local area network (LAN), a wide area network(WAN), and other networks.

The arrangement of the example cloud computing platform 110 is shown inFIG. 1B. As illustrated, the platform 110 includes a server 115 and astorage 117, serving as the storage space for the server 115. The server115 is a physical device hosting one or more virtual machines (VMs). Inthe example FIG. 1B, two VMs 119-1 and 119-2 are shown, and both areprotected entities. It should be noted that such a protected entity maybe any virtual cloud asset including, but not limited to, a softwarecontainer, a micro-service, a serverless function, and the like. For thesake of the discussion and without limiting the scope of the disclosedembodiments, VM-119-1 is an active machine and VM 119-2 is a machine atrest. That is, VM 119-2 is mostly in an inactive state (e.g., beingexecute a day in a month, a month in a year, and remains inactiveotherwise.

The storage 117 emulates virtual discs for the VMs 119-1 and 119-2executed in by the server 115. The storage 117 is typically connected tothe server 115 through a high-speed connection, such as optical fiber,allowing fast retrieval of data. In other configurations, the storage117 may be part of the server 115. In this example, illustrated in FIG.1B, a virtual disk 118-1 is allocated for the VM 119-1 and the virtualdisk 118-2 is allocated for the VM 119-2. The server 115, and, hence,the VMs 119-1 and 119-2, may be executed in a client environment 130within the platform 110.

The client environment 130 is an environment within the cloud computingplatform 110 utilized to execute cloud-hosted applications of theclient. A client may belong to a specific tenant. In some exampleembodiments, the client environment 130 may be part of a virtualizedenvironment or on-premises virtualization environment, such as a VMware®based solution.

Also deployed in the cloud computing platform 110 is a security system140 configured to perform the various disclosed embodiments. In someembodiments, the system 140 may be part of the client environment 130.In an embodiment, the security system 140 may be realized as a physicalmachine configured to execute a plurality of virtual instances, such as,but not limited to virtual machines executed by a host server. In yetanother embodiment, the security system 140 may be realized as a virtualmachine executed by a host server. Such a host server is a physicalmachine (device) and may be either the server 115, a dedicated server, adifferent shared server, or another virtualization-based computingentity, such as a serverless function.

In an embodiment, the interface between the client environment 130 andthe security system 140 can be realized using APIs or services providedby the cloud computing platform 110. For example, in AWS, a crossaccount policy service can be utilized to allow interfacing the clientenvironment 130 with the security system 140.

In the deployment, illustrated in FIGS. 1A and 1B, the configuration ofresources of the cloud computing platform 110 is performed by means ofthe management console 150. As such, the management console 150 may bequeried on the current deployment and settings of resources in the cloudcomputing platform 110. Specifically, the management console 150 may bequeried, by the security system 140, about the location (e.g., virtualaddress) of the virtual disk 118-1 in the storage 117. The system 140 isconfigured to interface with the management console 150 through, forexample, an API.

In some example embodiments, the security system 140 may furtherinterface with the cloud computing platform 110 and external systems170. The external systems may include intelligence systems, securityinformation and event management (SIEM) systems, and mitigation tools.The external intelligence systems may include common vulnerabilities andexposures (CVE®) databases, reputation services, security systems(providing feeds on discovered threats), and so on. The informationprovided by the intelligence systems may detect certain knownvulnerabilities identified in, for example, a CVE database.

In an embodiment, the security system 140 is configured to detectvulnerabilities and other cyber threats related to the execution VM119-1. The detection is performed while the VM 119-1 is live, withoutusing any agent installed in the server 115 or the VM 119-1, and withoutrelying on cooperation from the guest OS of the VM 119-1.

According to another embodiment, the security system 140 is configuredto detect vulnerabilities and other cyber threats related to theexecution VM 119-2. i.e., the machine at rest. The detection isperformed while the VM 119-2 is powered off.

In both embodiments, the security system 140 can scan and detectvulnerable software, non-secure configurations, exploitation attempts,compromised assets, data leaks, data mining, and so on. The securitysystem 140 may be further utilized to provide security services, such asincident response, anti-ransomware, and cyber-insurance, by accessingthe security posture.

In some embodiments, the security system 140 is configured to query thecloud management console 150 for the address of the virtual disks 118-1and 118-2, respectively serving the VM 119-1, VM 119-2, and a locationof the snapshot. A VM's snapshot is a copy of the machine's virtual disk(or disk file) at a given point in time. Snapshots provide a change logfor the virtual disk and are used to restore a VM to a particular pointin time when a failure error occurs. Typically, any data that waswritable on a VM becomes read-only when the snapshot is taken. Multiplesnapshots of a VM can be created at multiple possible point-in-timerestore points. When a VM reverts to a snapshot, current disk and memorystates are deleted and the snapshot becomes the new parent snapshot forthat VM.

In an embodiment, a view, or a materialized view, of the virtual disk118-2 associated with the VM 119-2 is accessed. A view is a stored querythat consumes limited-to-no space, consuming only the space required tostore the text of the query in the data dictionary. A materialized viewis a both a stored query and a segment. That is, a stored query isexecuted, and the results are materialized into the segment. For thesake of simplicity, but without limiting the scope of the disclosedembodiments, the inspection of VM (VM 119-2) is based on a view storedin the virtual disk 118-2, while the inspection of the active (VM 119-1)is based on a snapshot stored in the virtual disk 118-1.

The snapshot of the VM 119-1 is located and may be saved from thevirtual disk 118-1 for access by the security system 140. In anembodiment, the VM's 119-1 snapshot may be copied to the system 140. Ifsuch a snapshot does not exist, the system 140 may take a new snapshotor request such an action. The snapshots may be taken on a predefinedschedule or upon predefined events (e.g., a network event or abnormalevent). Further, the snapshots may be accessed or copied on a predefinedschedule or upon predefined events. It should be noted that when thesnapshot is taken or copied, the VM 119 still runs.

The view of the VM 119-2 is located and may be saved from the virtualdisk 118-2 for access by the system 140. In an embodiment, the VM's119-2 view may be copied to the system 140. If such a view does notexist, the system 140 may generate a query to create a new VM 119-2. Theview may be taken when the VM 119-2 is about to transition into aninactive state or when the same VM 119-2 is at rest. It should be notedthat when the view is taken or copied, the VM 119-2 may be at rest(i.e., inactive and powered off).

It should be noted that the snapshots and/or views of the virtual disk118-1 and/or 118-2 may not necessarily be stored in the storage 117,but, for ease of discussion, it is assumed that the snapshot is saved inthe storage 117. It should be further noted that the snapshots and/orviews are accessed without cooperation of the guest, virtual OS of thevirtual machine.

The snapshot is parsed and analyzed by the security system 140 to detectvulnerabilities. This analysis of the snapshot does not require anyinteraction and/or information from the VM 119-1. As furtherdemonstrated herein, the analysis of the snapshot by the system 140 doesnot require any agent installed on the server 115 or VM 119-1.

Further, the view is parsed and analyzed by the security system 140 todetect vulnerabilities. This analysis of the views does not require anyinteraction and/or information from the VM 119-2. In fact, the VM 119-2is in its inactive state (at rest) during the analysis. As furtherdemonstrated herein, the analysis of the view by the system 140 does notrequire any agent installed on the server 115 or VM 119-2.

Various techniques can be utilized to analyze the views and snapshots,depending on the type of vulnerability and cyber threats to be detected.Following are some example embodiments for techniques that may beimplemented by the security system 140.

In an embodiment, the security system 140 is configured to detectwhether there is vulnerable code executed by the VMs 119-1 and 119-2. Inan embodiment, the VM 119-2 being analyzed is shut down, being,therefore, at rest. The VM 119-1 may be running or paused. In anembodiment, to detect vulnerabilities existing in the VM 119-2, thesecurity system 140 is configured to match installed application lists,with their respective versions, to a known list of vulnerableapplications. Further, the security system 140 may be configured tomatch the application files, either directly, using binary comparison,or by computing a cryptographic hash against database of files invulnerable applications. The matching may be also on sub-modules of anapplication. Alternatively, the security system 140 may readinstallation logs of package managers used to install the packages ofthe application.

In yet another embodiment, the security system 140 is configured toverify whether the vulnerability is relevant to the VM 119-2. Forexample, if there is a vulnerable version or module not in use, thepriority of that issue is reduced dramatically.

To this end, the security system 140 may be configured to check theconfiguration files of the applications and operating system of the VM119-2 to verify access times to files by the operating system and/or toanalyze the application and/or system logs in order to deduce whatapplications and modules are running.

In yet another embodiment, the security system 140 may instantiate acopy of the VM 119-2 and/or a subset of applications of the VM 119-2 onthe server 115 or a separate server and monitor all activity performedby the instance of the VM. The execution of the instance of the VM is anisolated sandbox, which can be a full VM or subset of it, such as asoftware container (e.g., Docker® container) or another virtualizedinstance. The monitored activity may be further analyzed to determineabnormality. Such analysis may include monitoring of API activity,process creation, file activity, network communication, registrychanges, and active probing of said subset in order to assess itssecurity posture. This may include, but is not limited to, activelycommunicating with the VM 119-2 and using either legitimatecommunication and/or attack attempts to assess posture and, by that,deriving the security posture of the entire VM 119-2.

In order to determine if the vulnerability is relevant to the VM 119-2,the security system 140 is configured to analyze the machine memory, asreflected in the page file. The page file is saved in the snapshot andextends how much system-committed memory (also known as “virtualmemory”) a system can back. In an embodiment, analyzing the page fileallows deduction of running applications and modules by the VM 119-2. Itshould be noted that analyzing pages would be available only when VM119-2 hibernates.

In yet another embodiment, the security system 140 is configured todetect cyber threats that do not represent vulnerabilities. For example,the security system 140 may detect and alert on sensitive data not beingencrypted on the logical disk, private keys found on the disks, systemcredentials stored clearly on the disk, risky application features(e.g., support of weak cipher suites or authentication methods), weakpasswords, weak encryption schemes, a disabled address space layoutrandomization (ASLR) feature, suspicious manipulation to a boot record,suspicious PATH, LD_LIBRARY_PATH, or LD_PRELOAD definitions, servicesrunning on startup, and the like.

In an embodiment, the security system 140 may further monitor changes insensitive machine areas, and alert on unexpected changes, such as addedor changed application files without installation. In an exampleembodiment, this can be achieved by computing a cryptographic hash ofthe sensitive areas in the virtual disk and checking for differencesover time.

In some embodiments, the detected cyber threats (includingvulnerabilities) are reported to a user console 180 and/or a securityinformation and event management (SIEM) system (not shown). The reportedcyber threats may be filtered or prioritized based, in part, on theirdetermined risk. Further, the reported cyber threats may be filtered orprioritized based, in part, on the risk level of the machine. This alsoreduces the number of alerts reported to the user.

In an embodiment, any detected cyber threats related to sensitive data,including personally identifiable information, or PII, is reported at ahigher priority. In an embodiment, such data is determined by searchingfor the PII, analyzing the application logs to determine whether themachine accessed PII/PII-containing servers, or whether the logsthemselves contain PII, and searching the machine memory, as reflectedin the page file, for PII.

In an embodiment, the security system 140 may determine the risk of theVM 119 based on communication with an untrusted network. This can beachieved by analyzing the VM's 119-2 logs as saved in the virtual disk,and can be derived from the view.

In an example embodiment, the security system 140 may cause an executionof one or more mitigation actions. Examples for such actions may includedisabling the VM 119-2 from execution, updating the VM 119-2 with recentpatches, and so on.

The above examples for detecting vulnerabilities may be applicable alsofor a VM 119-1 and may be performed when the VM 119-1 will be startedlater on. For the active VM 119-1 the mitigation actions may includeblocking traffic from untrusted networks, halting the operation of theVM, quarantining an infected VM, and the like. The mitigation actionsmay be performed by a mitigation tool and not the system 140.

It should be noted that the example implementation shown in FIG. 1 isdescribed with respect to a single cloud computing platform 110 hostingtwo VMs 119-1 and 119-2 in a single server 115, merely for simplicitypurposes and without limitation on the disclosed embodiments. Typically,virtual machines are deployed and executed in a single cloud computingplatform, a virtualized environment, or data center and can be protectedwithout departing from the scope of the disclosure. It should be furthernoted that the disclosed embodiments can operate using multiple securitysystems 140, each of which may operate in a different clientenvironment.

FIG. 2 shows an example flowchart 200 illustrating a method fordetecting cyber threats including potential vulnerabilities in virtualmachines at rest, according to some embodiments. The method may beperformed by the security system 140.

At S210, a request, for example, to scan a VM, at rest, forvulnerabilities, is received. A VM at rest is a machine that iscurrently powered off, i.e., not in an operational state. A VM at restis executed at predefined time period but remains inactive (powered off)when not executed. The request, received at S210, may be received, orotherwise triggered, at every predefined time interval or upon detectionof an external event. An external event may be a preconfigured event,such as a network event or abnormal event including, without limitation,requests to run the VM 119-2 not according to a schedule, access by anauthorized user, and the like. The request may at least designate anidentifier of the VM to be scanned.

At S220, a location of a view of the VM, at rest, to be scanned isdetermined. In an embodiment, S220 may include determining the virtualdisk allocated for the VM, prior to determining the location of theview. As noted above, this can be achieved by querying a cloudmanagement console. In an embodiment, a snapshot of the VM, at rest, isaccessed. At S230, a snapshot of the virtual disk is accessed, orotherwise copied.

At S240, the view is analyzed to detect cyber threats and potentialvulnerabilities. S240 may also include detecting cyber threats that donot represent vulnerabilities. Examples for cyber threats andvulnerabilities are provided above.

In an embodiment, S240 may include comparing the view to some baseline,which may include, but is not limited to, a copy of the image used tocreate the VM, (e.g., lists of applications, previous snapshots),cryptographic hashes gathered in the previous scan, analyzing logs ofthe VMs, instantiating a copy of the VM and executing the instance orapplications executed by the VM in a sandbox, analyzing the machinememory, as reflected in the page file, or any combination of thesetechniques. Some example embodiments for analyzing the snapshots and thetypes of detected vulnerabilities and threats are provided above.

At S250, the detected cyber threats and/or vulnerabilities are reported,for example, as alerts. In an embodiment, S250 may include filtering andprioritizing the reported alerts. In an embodiment, the prioritizationis based, in part, on the risk level of a vulnerable machine. Thefiltering and prioritizing allow for reduction of the number of alertsreported to the user. The filtering can be performed on externalintelligence on the likelihood of this vulnerability being exploited,analyzing the machine configuration in order to deduce the vulnerabilityrelevancy, and correlating the vulnerability with the network locationand by weighting the risk of this machine being taken over by theattacker by taking into consideration the criticality of the machine inthe organization based on the contents stored or on other assetsaccessible from the VM.

At optional S260, a mitigation action may be triggered to mitigate adetected threat or vulnerability. A mitigation action may be executed bya mitigation tool and triggered by the system 140. Such an action mayinclude blocking traffic from untrusted networks, halting the operationof the VM, quarantining an infected VM, preventing its launch and thelike.

FIG. 3 is an example block diagram of the security system 140 accordingto an embodiment. The security system 140 includes a processingcircuitry 310 coupled to a memory 320, a storage 330, and a networkinterface 340. In an embodiment, the components of the security system140 may be communicatively connected via a bus 360.

The processing circuitry 310 may be realized as one or more hardwarelogic components and circuits. For example, and without limitation,illustrative types of hardware logic components that can be used includefield programmable gate arrays (FPGAs), application-specific integratedcircuits (ASICs), application-specific standard products (ASSPs),system-on-a-chip systems (SOCs), general-purpose microprocessors,microcontrollers, digital signal processors (DSPs), and the like, or anyother hardware logic components that can perform calculations or othermanipulations of information.

The memory 320 may be volatile (e.g., RAM, etc.), non-volatile (e.g.,ROM, flash memory, etc.), or a combination thereof. In oneconfiguration, computer readable instructions to implement one or moreembodiments disclosed herein may be stored in the storage 330.

In another embodiment, the memory 320 is configured to store software.Software shall be construed broadly to mean any type of instructions,whether referred to as software, firmware, middleware, microcode,hardware description language, or otherwise. Instructions may includecode (e.g., in source code format, binary code format, executable codeformat, or any other suitable format of code). The instructions, whenexecuted by the one or more processors, cause the processing circuitry310 to perform the various processes described herein. Specifically, theinstructions, when executed, cause the processing circuitry 310 todetermine over-privileged role vulnerabilities in serverless functions.

The storage 330 may be magnetic storage, optical storage, and the like,and may be realized, for example, as flash memory or as another othermemory technology, as CD-ROMs, Digital Versatile Disks (DVDs),hard-drives, SSDs, or any other medium which can be used to store thedesired information. The storage 330 may store communication consumptionpatterns associated with one or more communications devices.

The network interface 340 allows the security system 140 to communicatewith the external systems, such as intelligence systems, SIEM systems,mitigation systems, a cloud management console, a user console, and thelike.

It should be understood that the embodiments described herein are notlimited to the specific architecture illustrated in FIG. 3, and otherarchitectures may be equally used without departing from the scope ofthe disclosed embodiments.

The various embodiments disclosed herein can be implemented as hardware,firmware, software, or any combination thereof. Moreover, the softwareis preferably implemented as an application program tangibly embodied ona program storage unit or computer readable medium consisting of parts,or of certain devices and/or a combination of devices. The applicationprogram may be uploaded to, and executed by, a machine comprising anysuitable architecture. Preferably, the machine is implemented on acomputer platform having hardware such as one or more central processingunits (“CPUs”), a memory, and input/output interfaces. The computerplatform may also include an operating system and microinstruction code.The various processes and functions described herein may be either partof the microinstruction code or part of the application program, or anycombination thereof, which may be executed by a CPU, whether or not sucha computer or processor is explicitly shown. In addition, various otherperipheral units may be connected to the computer platform such as anadditional data storage unit and a printing unit. Furthermore, anon-transitory computer readable medium is any computer readable mediumexcept for a transitory propagating signal.

As used herein, the phrase “at least one of” followed by a listing ofitems means that any of the listed items can be utilized individually,or any combination of two or more of the listed items can be utilized.For example, if a system is described as including “at least one of A,B, and C,” the system can include A alone; B alone; C alone; A and B incombination; B and C in combination; A and C in combination; or A, B,and C in combination.

All examples and conditional language recited herein are intended forpedagogical purposes to aid the reader in understanding the principlesof the disclosed embodiment and the concepts contributed by the inventorto furthering the art, and are to be construed as being withoutlimitation to such specifically recited examples and conditions.Moreover, all statements herein reciting principles, aspects, andembodiments of the disclosed embodiments, as well as specific examplesthereof, are intended to encompass both structural and functionalequivalents thereof. Additionally, it is intended that such equivalentsinclude both currently known equivalents as well as equivalentsdeveloped in the future, i.e., any elements developed that perform thesame function, regardless of structure.

What is claimed is:
 1. A method for securing virtual cloud assets atrest against cyber threats, comprising: determining a location of a viewof at least one virtual disk of a protected virtual cloud asset, whereinthe virtual cloud asset is at rest and, when activated, instantiated inthe cloud computing environment; accessing the view of the virtual diskbased on the determined location; analyzing the view of the protectedvirtual cloud asset to detect potential cyber threats risking theprotected virtual cloud asset, wherein the virtual cloud asset isinactive during the analysis; and alerting detected potential cyberthreats based on a determined priority.
 2. The method of claim 1,further comprising: prioritizing each detection of potential cyberthreats based on their respective risk to the protected virtual cloudasset; and mitigating a potential cyber threat posing a risk to theprotected virtual cloud asset.
 3. The method of claim 1, whereindetermining the location of the view of at least one virtual diskfurther comprises: determining a virtual disk allocated to the protectedvirtual cloud asset.
 4. The method of claim 3, further comprising:querying a cloud management console of the cloud computing platform todetermine the location of the view and the location of the virtual disk.5. The method of claim 1, further comprising: requesting the cloudcomputing platform to create a new view of the protected virtual cloudasset, when an existing snapshot cannot be located.
 6. The method ofclaim 1, wherein analyzing the view of the protected virtual cloud assetfurther comprises: parsing a copy of the view; and scanning the parsedcopy to detect the potential cyber threats, wherein the potential cyberthreats include known and unknown vulnerabilities, and wherein thedetection is based on a type of vulnerability.
 7. The method of claim 6,wherein scanning the parsed copy further comprises any one of: checkingconfiguration files of each application, operating system, and systeminstalled in the protected virtual cloud asset; verifying access timesto files by the operating system installed in the operating system;analyzing system logs to deduce what applications and modules executedin the protected virtual cloud asset; and analyzing machine memorystored in the view to deduce what applications and modules executed inthe protected virtual cloud asset.
 8. The method of claim 6, furthercomprising: instantiating an instance copy of the protected virtualcloud asset from the view; and monitoring all activity performed by theinstance of the protected virtual cloud asset.
 9. The method of claim 1,wherein the protected virtual cloud asset includes any one of: a virtualmachine, a software container, a micro-service.
 10. A non-transitorycomputer readable medium having stored thereon instructions for causinga processing circuitry to execute a process for securing virtual cloudassets at rest against cyber threats, the process comprising:determining a location of a view of at least one virtual disk of aprotected virtual cloud asset, wherein the virtual cloud asset is atrest and, when activated, instantiated in a cloud computing environment;accessing the view of the virtual disk based on the determined location;analyzing the view of the protected virtual cloud asset to detectpotential cyber threats risking the protected virtual cloud asset,wherein the virtual cloud asset is inactive during the analysis; andalerting detected potential cyber threats based on a determinedpriority.
 11. A system for securing virtual cloud assets at rest againstcyber threats, comprising: a processing circuitry; and a memory, thememory containing instructions that, when executed by the processingcircuitry, configure the system to: determine a location of a view of atleast one virtual disk of a protected virtual cloud asset, wherein thevirtual cloud asset is at rest and, when activated, instantiated in acloud computing environment; access the view of the virtual disk basedon the determined location; analyze the view of the protected virtualcloud asset to detect potential cyber threats risking the protectedvirtual cloud asset, wherein the virtual cloud asset is inactive duringthe analysis; and alert detected potential cyber threats based on adetermined priority.
 12. The system of claim 11, wherein the system isfurther configured to: prioritize each detection of potential cyberthreats based on their respective risk to the protected virtual cloudasset; and mitigate a potential cyber threat posing a risk to theprotected virtual cloud asset.
 13. The system of claim 11, whereindetermining the location of the view of at least one virtual diskfurther comprises: determining a virtual disk allocated to the protectedvirtual cloud asset.
 14. The system of claim 13, wherein the system isfurther configured to: query a cloud management console of the cloudcomputing platform to determine the location of the view and thelocation of the virtual disk.
 15. The system of claim 11, wherein thesystem is further configured to: requesting the cloud computing platformto create a new view of the protected virtual cloud asset, when anexisting snapshot cannot be located.
 16. The system of claim 11, whereinanalyzing the view of the protected virtual cloud asset furthercomprises: parsing a copy of the view; and scanning the parsed copy todetect the potential cyber threats, wherein the potential cyber threatsinclude known and unknown vulnerabilities, and wherein the detection isbased on a type of vulnerability.
 17. The system of claim 16, whereinscanning the parsed copy further comprises any one of: checkingconfiguration files of each application, operating system, and systeminstalled in the protected virtual cloud asset; verifying access timesto files by the operating system installed in the operating system;analyzing system logs to deduce what applications and modules executedin the protected virtual cloud asset; and analyzing machine memorystored in the view to deduce what applications and modules executed inthe protected virtual cloud asset.
 18. The system of claim 16, whereinthe system is further configured to: instantiate an instance copy of theprotected virtual cloud asset from the view; and monitor all activityperformed by the instance of the protected virtual cloud asset.
 19. Thesystem of claim 11, wherein the protected virtual cloud asset includesany one of: a virtual machine, a software container, a micro-service.